Just for curiousity's sake, how far is too far to bike with your dog? When I go for bike rides, I tend to go far (12 miles is a very short ride) and while I haven't been blessed with a pittie (hopefully, I'll be able to rescue one within the next 3 years ), I like the idea of biking with one. I'm guessing that a dog wouldn't be able to go nearly as far as I would alone.

I do not think that you can give a time or distance limit on any dog out there, every individual dog is different. So I would suggest to take your dog along and see how much the dog is capable of, and perhaps with time add a little more distance. Obviously do not expect the dog to run for a few miles straight...

Also be very careful in hot weather. Dogs can overheat more easily than we do. Also, even if your dog is getting too tired to run, they will still try to keep up so they won't let you down. Always remember that it is you that has to protect their interests.

If you are running on pavement, concrete or rough surfaces, keep an eye on their paws.